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CALLAO PWS

Missouri — Community Water System — PWSID: MO2010125

System Information

PWSIDMO2010125
System NameCALLAO PWS
System TypeCommunity Water System
Water SourceSurface Water Purchased
Activity StatusActive
Owner TypeLocal
EPA Region07
Serves SchoolNo
WholesalerNo
First ReportedMar 7, 1980
Last ReportedDec 31, 2025

Location & Contact

StateMissouri
CityCALLAO
ZIP Code63534-0000
Address202 W 2ND ST
OrganizationSUMMERS, SUZANNE
Phone660-346-9860

Population & Service

Population Served311
Service Connections126

Drinking Water Violations (44)

This water system has 44 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Unaddressed — Consumer Confidence Rule
Jun 1, 2025 Jun 30, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2025 Revised Total Coliform Rule
Jun 1, 2025 Jun 30, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2025 Revised Total Coliform Rule
Jun 1, 2025 Jun 30, 2025 Revised Total Coliform Rule MON No Yes — — — Resolved Jun 30, 2025 Revised Total Coliform Rule
Oct 1, 2024 — Lead and Copper Rule MR No No — TT — Resolved Apr 28, 2025 Lead and Copper Rule
Mar 1, 2024 Mar 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2024 Revised Total Coliform Rule
Mar 1, 2024 Mar 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2024 Revised Total Coliform Rule
Mar 1, 2024 Mar 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2024 Revised Total Coliform Rule
Mar 1, 2024 Mar 31, 2024 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2024 Revised Total Coliform Rule
Dec 14, 2023 — Public Notice Other No No — — — Resolved Mar 27, 2024 Public Notice Rule and Revised PN Rule
Oct 1, 2023 — Public Notice Other No No — — — Resolved Mar 27, 2024 Public Notice Rule and Revised PN Rule
Apr 1, 2023 Apr 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2023 Revised Total Coliform Rule
Apr 1, 2023 Apr 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2023 Revised Total Coliform Rule
Apr 1, 2023 Apr 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2023 Revised Total Coliform Rule
Apr 1, 2023 Apr 30, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Apr 30, 2023 Revised Total Coliform Rule
Aug 1, 2022 Aug 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2022 Revised Total Coliform Rule
Aug 1, 2022 Aug 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2022 Revised Total Coliform Rule
Aug 1, 2022 Aug 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2022 Revised Total Coliform Rule
Aug 1, 2022 Aug 31, 2022 Revised Total Coliform Rule MON No Yes — — — Resolved Aug 31, 2022 Revised Total Coliform Rule
Jul 1, 2022 — Consumer Confidence Rule Other No No — — — Resolved Jun 30, 2023 Consumer Confidence Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2022 Dec 31, 2022 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Sep 1, 2021 Sep 30, 2021 Revised Total Coliform Rule MON No Yes — — — Resolved Sep 30, 2021 Revised Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Oct 1, 2015 Oct 31, 2015 Coliform (TCR) MR No No — 5% of samples — Resolved Oct 31, 2015 Total Coliform Rule
Jul 1, 2012 — Consumer Confidence Rule Other No No — — — Resolved May 5, 2014 Consumer Confidence Rule
Dec 1, 2011 Dec 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2011 Total Coliform Rule
Dec 1, 2011 Dec 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2011 Total Coliform Rule
Dec 1, 2011 Dec 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2011 Total Coliform Rule
Dec 1, 2011 Dec 31, 2011 Coliform (TCR) MR No No — 5% of samples — Resolved Dec 31, 2011 Total Coliform Rule
Oct 1, 2001 — Lead and Copper Rule MR No No — TT — Resolved Sep 8, 2004 Lead and Copper Rule
Jul 1, 2000 — Consumer Confidence Rule Other No No — — — Resolved Jun 22, 2001 Consumer Confidence Rule
Jan 1, 1995 — Lead and Copper Rule MR No No — TT — Resolved Dec 31, 1994 Lead and Copper Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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